Top definition
When one wears the clothes they wore to bed to school or work the next day without changing. In some cases, the individual puts on the clothes they'd like to wear the next day on at night and sleeps in them.
I had zero stress this morning about what to wear because of my spontaneous pajama day.
by loucaster November 16, 2014
Get the mug
Get a spontaneous pajama day mug for your cousin James.